Pulley and mounting for glass cutting lathes



Aug. 30, 1932. T. H. JARVIS 1,874,755

PULLEY AND MOUNTING FOR GLASS CUTTING LATHES I Griginal Filed May 9,1929 3 Sheets-Sheet 1 3% 7/ F r g- L INVENTOR.

I H Jan/is.

BY v

' 1 ATT NEY.

Aug. 30, 1932. T. H. JARVIS 7 PULLEY AND MOUNTING FOR GLASS CUTTI NGLATHES Original Filed May 9, 1929 5 Sheets-Sheet' 2 jj 1", I N VEN TOR.

' 54 i H Jan Z6;

AT RNEY.

Aug. 30, 1932. T. H. JARVIS 1,874,755

PULLEY AND MOUNTING FOR GLASS CUTTING LATHES Original Filed May 9, 19295 SheetsShe,et 3

I N VEN TOR.

I A i 1/ I I A RNEY.

Patented Aug. 30, 1932 UNITED STA-res PATENT OFFICE 7 0201!: H. JARVIS,or wEsr HUNTINGTON, wnsr .VIRGINIA PULLEY AND MOUNTING non GLASS CUTTINGLATI-IES Application filed May 9,1929, Serial 1T0 361,747. Renewed Apri17, 1932.

This invention relates to a glass cutting lathe or a lathe adapted toturn a stone, which cuts glass manually held and moved with respect tothe stone.

It is aimed to provideian eflicient machine for the aforesaid purposewhich will operate very steadily, is well balanced and substan tiallyfree of end play.

Another object is to provide a novel construction wherein the balancingof the tool operating spindle is controlled by a novel form of pulleymounted thereon and through which it is driven from a source of power.

It is further aimed to provide a novel construction or mounting meansfor the aforesaid spindle.

Various additional objects and advantages will become apparent from aconsideration of the description following taken in connection withaccompanying drawings, wherein:

Figure 1 is a view of the lathe in side elevation,

Figure 2 is a view of the lathe in end elevation,

may be adjusted together with the drum 21, to

Figure 3 is a plan view of the lathe,

Figure 4 is an enlarged section taken on line 44 of Figure 3, and vFigure 5 is a detail longitudinal section of a holder for stones ofsmall size.

Referring specifically to the drawings, the lathe includes aconventional skeleton mounting frame having upwardly and inwardlyconverging legs at 11, a base at 12, and a crown or bed plate 13,removably bolted to the legs 11 as at 14.

Integral with the plate 13 are supporting members 15 which detachablymount separable or sectional bearings 16 and 17.

A relatively stationary drum 18 has an annular groove 19 interfittingwith the bearing 16 and such bearing and drum have alined openings at 20for the application of lubricant. v

A relatively thick but longitudinally adjustable drum 21 extends throughthe bearing 17, having rings 22 and 23 threaded to such drum and adaptedto engage opposite sides of the bearing. 'The rings 22' and 23 controlthe position of the latter longitudinally'of the lathe. I Disposedwithin the drums 18 and 21 are ball bearing cages 24 and 25 of identicalconstruction. J ournaled in each of the bearings 24 and 25 is a toolspindle 26. Such spindle has a central passageway 27 through which watermay be passed from any suitable source, the inner end of such spindlebeing seated on. a stone 28 held in place by a'nipple 29 and a coactingnut 30 thereon bearing against a cap 31 which is bolted as at32 tothedrum 18. The element 28 and nipple 29 are provided with longitudinalpassages in registrae tion' with that at 27 Keyed as at 33 to thespindle 26,- is a combination balanced wheel and steppeddriving pulley34. Such pulley 34 has steps or portions 35'which are engageable by adriving belt as at 36, selectively, in order to drive the spindle 26 atdesired speed. i For the most part, the said pulley 34 is machined'bothexternally and internally in order ,to balance the same so that'it inturn will-balance the motion of the spindle 2'6, enabling it to operatewith minimum vibration. Integral with the pulley 34 "at one end is aflange 37 while 7 the other end is closed by a closure plate or disk 38,which is press-fittedinto the larger element 35 of the pulley '3 i .i Athrust bearing for the pulley 34 and spine dle 26 is provided at 39,beingcarried by a retainer 40 which is screw threaded as at 41 to theinterior of the drum 18. Spacing sleeves 42 loosely surround the spindle26an d;

7: I abut opposite sides of the bearings 24," one oftheni also abuttingthe disk 38 andthe other in turn being'engaged by one or more Thespindle 26 has its larger portion journaled in the front wall of thedrum 21 and inwardly of the *same is provided with a shoulder 44 whichabuts the bearing 25. YA

spacing sleeve 45 abuts the other side of said bearing and alsoabuts theflange 37. QSur: rounding the sleeve '45 and abutting said flange is athrust bearing'46 whichis carried by a retainer 47 screw threaded as at48 to the drum 21.

The bearing 17 and drum 21 have registering lubricant passages at 49. Inorder to prevent the escape of lubricant from the drums and bearingsassociated therewith,

o with the flange 37.

At the forward en' da -sui-table' stone'rsaiis .1 I able-source-of'powenFor instance-1t may drum 18 carries a gasket which-is in wip; ingoontactwith tlie disk 88 and drum 2'1 carries a gasket 51 which is inwiping contact screw threaded to the spindle 26 as at 53.

Obviously the stone" may of any sizeor If .a smaller one than that shapedesired.

desired, a holder 5tmay'b'e shown at 52 is screwthreaded at-55 tothe'screw-threads 53 and at its outer end have the-smaller-stone- 56screwjthreaded thereto at- 57-, such holder 54;- havin -g a' waterpassageway 58 therethrough which is in registry with the pas sage-27;

.In using' the machine, the operator holds 1 the glass-article to-becut, and movesthe same;

relativeto the 1 stone Y 52, 56 orthe-like and theconstantly suppliedwater piasses from the pass ageway'27' into a receiving; trough 59'which may be supported in any, desired-unanner-asby neans'o-f brackets60- attached to the legs 11.

7 shown conventionally at 61 and is preferably adjustabla to which-endhas a depending" rod ustably-clamped at63 in abraeket- 64 fastened toone of the-legs 11,

Thebelt-36 may be driven-froni any suitcoact 'with the steps6'5-of-apulley 66 identical with thatatfi and iscarriedby; a countershaft 67 appropriately mounted in bear- I ings- 68- supported on'the:'base-1% Shaft-6T also has a stepped pulley 69; keyed theretooverwhieh a drive'belt'm is trainedi-such' belt 7 0 being" drivenby. anysuitable-source of power.

Various changes may be resorted't'oprovided they fall within the spiritandv scope oftheinvention- I claim: as my invention:---

11 A spindlebearing assembly having; a bearing, members,-

tool carrying. spindle, drums carried "by: said members, bearing devices inth'e drums, said spindle beingjournaled in saidbearingidevices,abalanced driving; pulley keyed to' the spindle and located between? 1said devices a-cap on one (I of: said-'- drumspa nipple on said cap, andabearing device in said nipple in bearingeng-agement with the inner endof; the spindle;

2 Aspiridl bear ngrassembly comprising 7 a bed, integralsupportsthereon,a sectienah bearing carried by, said support; drums fitted tosaidbearing, one otsaid drumshavingringsscrew; threaded thereto andengaging opposite sides oit theadj aeent bearing to perniitthe drums tobe adjusted longitudinally, ;-a balea An arm rest for use ofth'eoperatonis lastmentioned device and the adjacent end of the pulley,-spacin sleeves on opposite sides of theother bearing device, oneengagingthe-adjacentendbfthepulley, a nut on the spindle engaging theopposite end of the other sl'eeve.

In testimony whereof; I aflix- I ny sig-n atu-re.

' TOM JARVIS.

